Automatic cylinder-cock.



'u E. A. DAYMON.

AUTOMATIC CYLINDER COCK. APPLICATION FILED lune 2. 1914.

Llym. Patentedsept. 14,1915.

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EUGENE- A. Darmon, or LIMA, omo.

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Specification of Letters Patent. y i Patented Sep@ 14, 1915.

Application mea June a, 1914. seria1N0.842,4l11.

To aZZ, whom t may conceml' Be it known that I, EUGENE A. DAYMON, citizen of the United States, residing at Lima, in the county of Allen and State of Ohio, have invented certain new and useful l Improvements in Automatic Cylinder-Cocks.`

of which the following is a specification.

This invention relates to cylinder drain cocks and has for its object the provision of a simple, eiicient and automatically operating device by the `use of which 'all excess water and condensed steam may'drain freely yfrom a locomotive or other engine'cylin'der so as to avoid freezing or bursting of the cylinder heads.

A further object of the invention is to provide` a drain cock so constructed thatithe parts may be readily assembled and may be.

easily removed in the event of damage.A 'And 'a still further object of the invention is to ugent and showing the drainage and relief valves both seated. Fig-2 is a similar view showing the drainage valve unseated.l Fig. Sais' adetail perspective view of'the valves. Corresponding land like parts are referred to in the following description and indicated in all the views of the accompanying drawings by the same reference characters. In carrying out my invention, I employ a .Valve casing 1 at each end of the engine cylinder, a portion of which is in dicated at 2. The valve casing is provided wlth a reduced threaded end 3 which yis screwed into the Wallof the cylinder and lhas a iiaredbore leading from the cylinder, as shown. The valve casing has a cylindrlcal body 4 integral with and extendingv downwardly or outwardly from the said flaredgend 3, and the outer or lower end ofthe said cylindrical body is open and internally threaded, as clearly shown, ahead 5 belng tted in the said open end so as to close .the same ,and provide a support for the operating parts. rllhis head 5 is provided with an annular external `iange 6 which abuts the open end of the cylindrical body 4 and thereby limits the movement of the head into the said body and also imparts afneat smooth finish to the device. Outlet v,passages -7 are provided? through the said head and in a central threaded opening in the head is fitted an adjusting screw 8, on the outer end of which is mounted a lock nutA 9. The inner wall of the valve casing is provided with a ground valve seat 10 at'the junction of the cylindricalbody 4 and the tapered extremity of the casing which valve seat is normally engaged by the beveled surface 11 of the relief valve 12. The saidvalve 12 consists essentially of a cylindrical body `13 having an expanded head at its upper end on which the said beveledl surface 411 is formed, the said end of the cylindrical body 13 being open and flared, as shown at 14, to provide a seat for the primary valve 15. The lower end of the cylindrical valve body 13 is constructed with a spider 16 having outlet openings 17 therethrough and also provided with acentral opening in which the stem 18 of the `lrainage valve plays. .The relief valve is normally'held againstits seat 10 bya spring 19 which is coiled 'around the body of the said valve between the valve casing` head 5 and ,the eXpandedhead of'the valve, so that the expansion of the spring will act between the casing head'and fthe-valve to hold the valve against the'seat, the tension of the spring being adjusted so that the pressure exerted bythe said spring will be greater than that for which the safety valve on the boiler is set but less than the breaking point of the engine cylinder head.v

The valve 15 consists'of'a disk having a beveled edge 20 adapted to seat against the flared end 14 of the reliefvalve and form a i ground joint therewith, and the stem 18 of saidv valve is'rigid withthe disk and depends therefrom'through the central open` ing of the spider 16,"as shown. A spring 21 v is coiled around the said stem between :the

.valve stem 18, I secure a stop 22 which vis illustrated as consisting of a small cap fitted over the end of the stem and held thereto by a cotter pin 23. It will be understood,howev'er, that the specific construction of this stop and the manner in which it isfastened tothe stem is immaterial.

The construction and arrangement of the partsfbeing thus made known, the operation and advantages of the device will be readily understood. A

When the throttle valve kis open and live steam entering the engine cylinder, the pressure of the steam will hold the drainage valve seated but will not overcome the tension of the spring 19 and, therefore, both valves 'will remain seated and the drain cock be. effectually closed, as shown in full lines in Fig. 1. valve is closed, the spring 21 will expand so as to open the drainage valve and the water of condensation will then at once drain through the cylinder cock, flowing around the drainage valve and` out through the openings 17 and 7 as will be readily understood on reference to Fig. 2. Should the water in the boiler be at a high level so that the steam passing into the engine cylinder will not be dry and some water will be carried with the same, this surplus water will be compressed between the piston and the head of the'cylinder and will then, of course, flow from the cylinder into the draincock casing. 'The pressure exerted by this cornpressed water and such steam as may be carried by the same, will overcome the tension of the spring 19 and unseat the relief valve so that it may fiow around the said valve and out through the outlet openings 7. The

drainage valve will, of course, be held against the reliefvalvev by the pressure of this compressed water until the end of the valve stem or the head of the cap 22 impinges against the end of the adjusting screw 8, when, of course, further downward movement of the drainage valve will. be arrested and said valve will be unseated so that the water may then fiow past the valve and out through the openings 7. Itwill thus be -seen by reference to the dotted lines 1n Fig. l that a large outlet will be provided for such compressed water and the pressure upon the cylinder head relieved so that fracture of the heads or stripping of the fastening `bolts for the same will be avoided. The adjusting screw 8 may be set to permit anyl desired movement of the drainage valve relative to the 'relief valve and will preferably be so adjusted that a downward movement of about 12 of an inch will unseat the drainage valve while the relief valve may continue to move and open to the extent ofl fof an inch or more, the reliefvalve continuing to move downward until its lower. end or spider impinges Afluids passing through the. device.

As soon as the throttle against the step 22; It is also obvious that upwardly against the lower .end` of i the relief valve.

It will be readily seen. that I have provided a very simple and compactly arranged apparatus which wil o erate automatically to thoroughly drain th engine cylinder and that freezing of the device will not occur inasmuch as the hot steam playing upon the valves lwill keep the same at a sufficiently high temperature, to prevent cooling of the When the engine is coasting or running on a down grade, there will be sufficient back pressure in the -engine cylinder to hold the drainage valve seated.

Having thus described the invention; what is claimed as new is:

l. A drain cock comprising a valve casing, a'relief valve mounted therein and normally seated thereagainst, a normally open drainage valve carried by theyrelief valve and adapted to seat aga-inst' the same, and means 'external to the relief valve and common to both valves for limiting the unseating movement of each valve.

2. A drain cock comprising a valve casing, a normally open drainage valve, a relief valve normally seating against the valve casing and providing a seat for the drainage valve, and means below the relief'valve for limiting the opening movement of both valves and permittingsimultaneous movements thereof in the same direction but of unequal duration.

- 3. A `drain cock comprising a valve casing. a relief valve mounted therein, yieldable means for normally holding said valve seated against the valve casing, a drainage valve adapted to -,seat upon the relief valve,

means tending to unseat the drainage valve, and means 4below the relief valve and carriedby the drainage valve for limiting the unseating movement of both valves and successively arresting their movement -away from the seating engagement with the casing.

4. A drain cock comprising a valve casing, a relief valve arranged within the casing and normally seated against the same, la drainage valve carried by the relief valve and adapted to seat upon the same, an adjustable stop4 mounted in the valve casing in the path of-movement of the drainage valve to limit the outward movement of said valve in the casing, and a stop carried by the said drainage valve to limit the outward movement of the relief valve and the movement of the drainage valve relative to the relief valve. A

5. A drain cock comprising a valve oasing, a drainage valve therein, a relief valve seated against the casing and providing a seat for the-drainage valve, thef two valves being relatively movable, and means carried by one of the valves and'engaging the other valve for limiting the relative movement of the valves and also limiting the movement of the relief valve from its seat on thecasing.

6. A drain'cock comprisingla valve casing, a relief valve seated iwithin the valve casing and having a hollow cylindrical body.

provided with an outlet yin its `lower end, a

ldrainage valve adapted to lskeatupon the revalve, means within the relief valve tending to unseat the drainage valve, and yieldable means tending to hold the'relief valve seated against the casing. t

7. A drain cock comprising a casing having outlet openings in its lower end, a tubular relief valve arranged within the casing and having outlet openings in its lower end, the upper end of said valve being laterally expanded' andadapted to seat against the inner wall of the casing, a vspring coiled around said valve and bearing at its upper end against the laterally yexpanded lportion of the same and at its lower endl against' the lower end of the esing, a drainage valve adapted to seat in t e upper end of the re1ief,valve and having a stem extending through the lower end of the relief valve, a spring coiled around said stem and bearing at one end against said valve and at 'the opposite end against the lower end of the relief valve, a stop onsaid stem adapted to impinge against the lower end of the relief valve, and a stop on the lower end of` the casing in the path of said` stem.

In testimony whereof l alix my signature in presence of two witnesses.

K EUGENE A. DAYMON. [-L. a] Witnesses ALEN C. Warm CLOYD J. BRoTHERToN;

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